/Engine/Source/Editor/UnrealEd/Public/WorkflowOrientedApp/WorkflowTabManager.h
Retrieves the factory from the current history data, which is being displayed by the tab
[TWeakPtr](API\Runtime\Core\Templates\TWeakPtr)< [FDocumentTabFactory](API\Editor\UnrealEd\WorkflowOrientedApp\FDocumentTabFactory) > GetFactory() const